If I view my SO reputation for 10/1/2009 - 10/1/2009, I see the 5 questions listed, with no down-voting (second red column is all zeros) and a combined first column of 125.
If I view my reputation for 9/30/2009 - 9/30/2009, I see the 8 questions listed, with no down-voting (second red column is all zeros) and a combined first column of 160.
(2 of the questions are common between 9/30 and 10/01 lists)
If I view my reputation for 9/30/2009 - 10/1/2009, I see the 17!!! questions listed
7 of them have "-2" down-votes (and I saw my rep drop by ~10 points within 1/2 hour today, so it did happen recenlt)
A combined first column of 285.
Question 1: How come the 7 down-votes on 7 questions do not show up in either 9/30 nor 10/1 view?
Question 2: How can I tell whether some of the 7 down-votes were a result of serial downvoter (I know 100% sure that at least 3 of them were voted down within 1 minute as I saw it on my Recent screen).